Synthetic saponite clays as promising solids for lanthanide ion recovery,New Journal of Chemistry

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Synthetic saponite clays as promising solids for lanthanide ion recovery
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-01-14 , DOI: 10.1039/c9nj05983k
Stefano Marchesi _{1,

2,

3,

4} , Fabio Carniato _{1,

2,

3,

4} , Matteo Guidotti _{4,

5,

6} , Mauro Botta _{1,

2,

3,

4} , Leonardo Marchese _{1,

2,

3,

4} , Chiara Bisio _{1,

2,

3,

4,

5}

Affiliation

Extraction of lanthanide ions with different ionic radius (La³⁺, Gd³⁺ and Lu³⁺) from aqueous solutions was carried out by using two synthetic saponite clays. The clays, prepared through a simple and low-cost hydrothermal approach, showed different particle size and cation-exchange capacity (CEC) and were characterized in order to evaluate the influence of their physico-chemical properties on the uptake process. Metal uptake tests, performed in pure water and simulated freshwater and seawater solutions, demonstrated that synthetic saponites have a general good sorption capacity with high lanthanide capture after a few hours of contact. The solid samples showed a higher selectivity for Lu³⁺, due to its small ionic radius.

中文翻译：

合成皂石粘土作为镧系元素离子回收的有前途的固体

通过使用两种合成的皂石粘土从水溶液中提取具有不同离子半径（La ³⁺，Gd ³⁺和Lu ³⁺）的镧系离子。通过简单且低成本的水热方法制备的粘土具有不同的粒径和阳离子交换能力（CEC），并进行了表征，以评估其理化性质对吸收过程的影响。在纯水，模拟淡水和海水溶液中进行的金属吸收测试表明，合成皂石经过数小时的接触后，通常具有良好的吸附能力，并具有较高的镧系元素捕获率。固体样品由于其较小的离子半径而对Lu ³⁺具有较高的选择性。

更新日期：2020-01-14

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